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OpenAPI Specification

openapi: 3.2.0
info:
  title: Alternativas IA HTTP surfaces MCP API
  version: 1.20.0
  summary: Machine-readable map of the real HTTP endpoints on alternativasia.com.
  description: 'Alternativas IA is served from this origin. Query the catalog through the MCP endpoint documented here — there is no parallel REST catalog. Unknown /api paths return JSON { error, status }. Public HTML pages also speak markdown at the same URL (Accept: text/markdown). Rate limit: 120 requests / 60s (IETF RateLimit + RateLimit-Policy; Retry-After on 429). URL path /api/v1 is the current catalog JSON. Responses also send API-Version: 1. Breaking changes ship under /api/v2. Deprecated versions get Deprecation and Sunset headers for at least 90 days. There is no v2 yet.'
servers:
- url: https://alternativasia.com
tags:
- name: MCP
paths:
  /api/mcp/mcp:
    post:
      summary: MCP Streamable HTTP endpoint for this site's catalog
      operationId: mcp
      description: 'JSON-RPC MCP at https://alternativasia.com/api/mcp/mcp. Tools: search_tools, get_tool, list_alternatives, submit_tool, list_offers, create_checkout. Tenant is the Host.'
      responses:
        '200':
          description: MCP JSON-RPC response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/McpRpc'
      tags:
      - MCP
  /mcp:
    post:
      summary: Standard MCP Streamable HTTP alias of /api/mcp/mcp
      operationId: mcpAlias
      description: Same tools and handshake as /api/mcp/mcp. POST initialize (Accept JSON+SSE), notifications/initialized is 202, GET is SSE.
      responses:
        '200':
          description: MCP JSON-RPC or SSE
        '202':
          description: initialized notification accepted
      tags:
      - MCP
    get:
      summary: Open the Streamable HTTP GET SSE stream
      operationId: mcpAliasGet
      responses:
        '200':
          description: text/event-stream
      tags:
      - MCP
components:
  schemas:
    McpRpc:
      type: object
      properties:
        jsonrpc:
          type: string
        id: {}
        result:
          type: object
        error:
          type: object
  securitySchemes:
    CatalogScopes:
      type: oauth2
      description: Named permission scopes this origin documents. Public catalog reads need no token (catalog:read). catalog:write is submit_tool only. There is no agent token endpoint.
      flows:
        authorizationCode:
          authorizationUrl: https://alternativasia.com/api/auth/signin
          tokenUrl: https://alternativasia.com/api/auth/signin
          scopes:
            catalog:read: Public catalog reads (HTML, markdown, MCP read tools, /api/v1/listings, /ask)
            catalog:write: submit_tool creates a DRAFT the maker must claim